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July 04 2013

February 21 2013

Science Podcast - Benefits of HIV treatment, nuclear North Korea, saving seeds, and more (22 Feb 2013)

HIV treatment in South Africa not only increases life expectancy, but proves to be financially advantageous; what North Korea's latest nuclear test means, scientifically and politically; and new ways of preserving plant biodiversity.

May 09 2011

02mydafsoup-01

May 07 2011

Computer Scientists Induce Schizophrenia in a Neural Network, Causing it to Make Ridiculous Claims

Researchers testing mental illness figured out how to induce schizophrenic symptoms in a computer, causing it to place itself at the center of crazy delusions, such as claiming responsibility for a terrorist bombing. The results bolster a hypothesis that claims faulty information processing can lead to schizophrenic symptoms.

Computer scientists at the University of Texas-Austin built a neural network called DISCERN, which is able to learn natural language. The humans taught it a series of simple stories, teaching it to store information as relationships between words and sentences — much the same way a person would learn a story.

Then they started again, but cranked up DISCERN’s rate of learning — so it was assimilating words at a faster rate, and it was not ignoring as much noise in the data.

Some mental health experts believe schizophrenics cannot forget or ignore as much stimuli as they should, which makes it difficult to synthesize and process the correct information. This “hyperlearning” phenomenon causes schizophrenics to lose connections among individual stories, losing the distinction between reality and illusion. Dopamine is a key factor in the process of understanding and differentiating experiences.

Telling the computer to “forget less” was akin to flooding the system with dopamine, confounding its ability to discern relationships between words, sentences and events, according to a news release from UT.

“DISCERN began putting itself at the center of fantastical, delusional stories that incorporated elements from other stories it had been told to recall,” according to the news release. In one answer, it claimed responsibility for a terrorist bombing.

The experiment doesn’t prove the hyperlearning hypothesis, but it does lend it additional credence, according to the researchers, who published their crazed computer findings in the journal Biological Psychiatry. It also shows that neural networks can be a useful analogue for the information-processing centers of the brain, according to graduate student Uli Grasemann, who participated in the research.

“We have so much more control over neural networks than we could ever have over human subjects,” he said. “The hope is that this kind of modeling will help clinical research.”

[via ScienceBlog]

Reposted fromSigalontech Sigalontech

May 27 2010

Jugendmedienschutz: Der AK Zensur macht den Praxistest

Der Arbeitskreis gegen Internetsperren und Zensur hat heute ein sehr interessantes Experiment vorgestellt. Er möchte testen, wie sich der neue Jugendmedienschutz-Staatsvertrag tatsächlich in der Praxis auswirkt und auswirken kann.

Hierzu benennt der AK Zensur jetzt jeden Tag eine Website und bittet die Nutzer eine Altersklassifizierung vorzunehmen. Die Nutzer sollen also ihre Meinung dazu äußern, welche Altersfreigabe sie der betreffenden Website geben würden. Das Experiment beginnt heute. Nehmen Sie bitte zahlreich an der Abstimmung teil.

April 21 2010

02mydafsoup-01
Computer, sagt der amerikanische Mathematiker Steve Strogatz, berechnen mittlerweile Dinge, die auch die brillantesten Mathematiker nicht mehr überprüfen können.
Macht der Simulation: Plötzlich sind wir alle Zuschauer - Digitales Denken - Feuilleton - FAZ.NET

February 04 2010

02mydafsoup-01

EFF-TEST - Your Browser's Fingerprints

Browser-Spoofing ist auch nur sehr begrenzt sinnvoll, in Anbetracht der detaillierten Auflistung aller anderen Browserkomponenten, wie Plugins, etc. - es ist ein Kinderspiel das einzelne Profil zuverlässig herauszufiltern. Ich benutze SeaMonkey, was den Erkennungsquotienten um ein zig-faches steigert, verspüre aber nicht leiseste Lust, deshalb den Browser zu wechseln. Die allgemeinen Daten- und Persönlichkeitsschutzauflagen für Browser und Provider sind schlichtweg katastrophal, das kann man sich als Internetnutzer nicht oft genug vor Augen führen - der EFF-Test erteilt einem hierüber eine unmissverständliche Lektion.

January 28 2010

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